/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemBlueprintLibrary.h
Manually sets the duration on a specific effect
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Ability|GameplayEffect") static [FGameplayEffectSpecHandle](API\Plugins\GameplayAbilities\FGameplayEffectSpecHandle) SetDuration ( [FGameplayEffectSpecHandle](API\Plugins\GameplayAbilities\FGameplayEffectSpecHandle) SpecHandle, float Duration )